The progress in understanding of perovskite solar cells points to a direction that perovskite solar cells resemble that of traditional thin film solar cells. The low temperature solution process allows the integration of polymer and organic charge transport or buffer layers in perovskite solar cells for optimal energy conversion efficiency, despite that perovskite solar cells can work without these buffer layers at lower performance. It naturally bonds the traditional thin film solar cells and organic solar cells, which adds the versatility of the device designing for reduced cost and new functionalities, in addition to the boosted device efficiency. In this talk, I will present our recent progress in understanding on the important function of the surfaces of the buffer layers on the grain morphology of perovskite films and associated electronic states in perovskite. I will also discuss some of our new strategies to applying unique interfacial layers to understand the origin of several key performance parameters in perovskite solar cells, including charge recombination and open circuit voltage.

Influence of surfaces and interfaces on the grain morphology and electronic structures in perovskite solar cells

251st National Meeting (2016)

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